Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part – Between blade edge and static part
Patent
1989-09-08
1992-03-17
Kwon, John T.
Rotary kinetic fluid motors or pumps
Bearing, seal, or liner between runner portion and static part
Between blade edge and static part
415127, 4151741, F01D 1108
Patent
active
050963759
ABSTRACT:
A mechanical clearance control apparatus operable for controlling the clearance between the rotor blade tips and the casing shroud of a gas turbine engine employs a radial adjustment mechanism. The adjustment mechanism includes an externally threaded hollow adjustment bushing disposed over a screw and rotatably and threadably coupled to an internally threaded bore of a stationary casing-shroud mounting section. Rotation of the bushing relative to the mounting section bore produces axial movement of the bushing relative thereto. An annular shoulder and a snap ring on a screw permit the bushing to rotate relative to the screw and carries the screw along with the axial movement of the bushing. One of several holes in the bushing rim can be aligned with a selected one of a pair of holes in the mounting section and a locking pin inserted in the aligned pair of holes to lock the sleeve to the stationary mounting section. The axial movement of the bushing which produces axial movement of the screw therewith results in radial movement of the shroud segment relative to the rotor without changing the rotational orientation of the screw and its connection to a lever arm connected the unison ring.
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Technical Report AEAPL--TR--79--2087, entitled "Thermal Response Turbine Shroud Study" by E. J. Kawecki of Pratt & Whitney; Jul. 1979.
General Electric Company
Kwon John T.
Squillaro Jerome C.
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